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Simon,
I know some prefer to turn back the diaphragm a bit further but I rather
stick to the manufacturers instructions. It does not do any harm though,
you just increase the stroke of the diaphragm very slightly. Anyway it
is not always very clear when the points stop throwing over so it is
easy to be wrong by one hole.
Also in practical terms I have fun. I quite like to rebuild the
SU-pumps. It is always nice to get a dirty clapped out pump with cracked
tops and pedestals, rusted valves, dried out seals, cauliflowers on the
points etc. going like a dream after an hours work. Sometimes I have to
concede defeat when the screws are rusted solid and snap in the
aluminium of the pump body or when the coil has burned out but those
occurrences are very rare.
Kees Oudesluijs
Op 5-12-2018 om 11:44 schreef simon.lachlan@alexarevel.plus.com:
>
> Yes and I think some of the experts have suggested turning back one
> extra hole.
>
> These pumps certainly give us hours of theoretical fun(?) if not
> always so much in practical terms. Having said that, I â?? touch wood â??
> have never had any trouble with them that didnâ??t arise from negligence
> ie back in the days when I didnâ??t know what points were, let alone how
> and when to adjust them.
>
> Simon
>
> *From:*Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Kees
> Oudesluijs
> *Sent:* 05 December 2018 09:55
> *To:* healeys@autox.team.net
> *Subject:* Re: [Healeys] Fuel pumps (AGAIN!)
>
> Bob,
>
> The settings are the same for all SU pumps as the coil housing with
> points assembly is mechanically the same on all SU-pumps.
>
> top blade to pedestal at the very front of the blade: 0,9mm/0,035
>
> coil body to lip on lower points assembly: 2,3mm/0,090", this used to
> be 1,9mm in the early days with a slightly different points design
> (NLA), but I set them all to 2,3mm using the later points
>
> Also important is the adjustment of the diaphragm:
>
> Remove the 10 guiding brass rings, five 8-shaped plastic parts or a
> U-shaped plastic casting between the steel centre of the diaphragm and
> coil housing.Screw in the diaphragm slowly while continually moving it
> in and out firmly, holding the pump horizontal, until the points just
> do not throw over any more, turn the diaphragm back to line up with
> the nearest hole and then turn back another 4 holes. Refit the guiding
> brass rings/8-shaped plastic parts/ U-shaped plastic casting. Be
> careful that these are seated properly. If not they will get damaged
> and the diaphragm will be destroyed when fitting the pump body and
> coil housing together.
> Adjust the points as previously described.
>
> Fit a transil between the small terminal screw of the points blade and
> one of the 2 larger pedestal screws.
>
> Kees Oudesluijs
>
> Op 5-12-2018 om 04:55 schreef Bob Spidell:
>
> David,
>
> Are the factory settings per SU the same as those in the shop
> manual (Bentley, in my case)?
>
> Bob
>
>
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<p>Simon,</p>
<p>I know some prefer to turn back the diaphragm a bit further but I
rather stick to the manufacturers instructions. It does not do any
harm though, you just increase the stroke of the diaphragm very
slightly. Anyway it is not always very clear when the points stop
throwing over so it is easy to be wrong by one hole.<br>
</p>
<p>Also in practical terms I have fun. I quite like to rebuild the
SU-pumps. It is always nice to get a dirty clapped out pump with
cracked tops and pedestals, rusted valves, dried out seals,
cauliflowers on the points etc. going like a dream after an hours
work. Sometimes I have to concede defeat when the screws are
rusted solid and snap in the aluminium of the pump body or when
the coil has burned out but those occurrences are very rare.</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 5-12-2018 om 11:44 schreef
<a class="moz-txt-link-abbreviated"
href="mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexarevel.plus.com</a>:<br>
</div>
<blockquote type="cite"
cite="mid:000501d48c87$8d448aa0$a7cd9fe0$@alexarevel.plus.com">
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Yes
and I think some of the experts have suggested turning back
one extra hole. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">These
pumps certainly give us hours of theoretical fun(?) if not
always so much in practical terms. Having said that, I â??
touch wood â?? have never had any trouble with them that
didnâ??t arise from negligence ie back in the days when I
didnâ??t know what points were, let alone how and when to
adjust them.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p>Â </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US"> Healeys
<a class="moz-txt-link-rfc2396E"
href="mailto:healeys-bounces@autox.team.net";><healeys-bounces@autox.team.net></a>
<b>On Behalf Of
</b>Kees Oudesluijs<br>
<b>Sent:</b> 05 December 2018 09:55<br>
<b>To:</b> <a class="moz-txt-link-abbreviated"
href="mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Fuel pumps
(AGAIN!)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<p>Bob,<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p><o:p>Â </o:p></p>
<p>The settings are the same for all SU pumps as the coil
housing with points assembly is mechanically the same on all
SU-pumps.<o:p></o:p></p>
<p>top blade to pedestal at the very front of the blade:
0,9mm/0,035<o:p></o:p></p>
<p>coil body to lip on lower points assembly: 2,3mm/0,090", this
used to be 1,9mm in the early days with a slightly different
points design (NLA), but I set them all to 2,3mm using the
later points<o:p></o:p></p>
<p>Also important is the adjustment of the diaphragm: <o:p></o:p></p>
<p>Remove the 10 guiding brass rings, five 8-shaped plastic
parts or a U-shaped plastic casting between the steel centre
of the diaphragm and coil housing.Screw in the diaphragm
slowly while continually moving it in and out firmly, holding
the pump horizontal, until the points just do not throw over
any more, turn the diaphragm back to line up with the nearest
hole and then turn back another 4 holes. Refit the guiding
brass rings/8-shaped plastic parts/ U-shaped plastic casting.
Be careful that these are seated properly. If not they will
get damaged and the diaphragm will be destroyed when fitting
the pump body and coil housing together.<br>
Adjust the points as previously described. <o:p></o:p></p>
<p>Fit a transil between the small terminal screw of the points
blade and one of the 2 larger pedestal screws.<o:p></o:p></p>
<p><o:p>Â </o:p></p>
<p>Kees Oudesluijs<o:p></o:p></p>
<p><o:p>Â </o:p></p>
<p><o:p>Â </o:p></p>
<div>
<p class="MsoNormal">Op 5-12-2018 om 04:55 schreef Bob
Spidell:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p>David,<o:p></o:p></p>
<p>Are the factory settings per SU the same as those in the
shop manual (Bentley, in my case)?<o:p></o:p></p>
<p>Bob<o:p></o:p></p>
<br>
</blockquote>
</div>
</blockquote>
</body>
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